Hydrostatic bailer



c. E. VAN STONE Er AL- HYDROSTATI'C BAILER Filed Oct. 3l, 1938 Patented Feb. zo, 1940 `I-IYDROSTATIC BAILER Clifford E. Van Stone and Arthur E. Johnson,

` Taft, Calif.

Application October 31, 1938, Serial No. 237,852

` 3 Claims. This invention is a compensating hydrostatic bailer, that is, it is a bailer for `use in wells where there is a stand of water above the well muck p which is to be cleaned; and the bailer is provided with an elongating or upper barrel part valved at its top to normally close when this barrel part is pulled upwardly as to the bailer bottom or bucket section While this is at` rest in or on the bed of well stand or muck.

Such pulling of the valved, upper part of the bailer unbalances the static pressure of the liquid in the bailer relative to that without with me result that the higher outside pressure tends to cause an inflow of the well liquid and muckinto the bailer.

The bucket section of the bailer is inlet-valved and it will be seen that by repeatedly reciprocating the barrel part on the stationary bucket structure the bailer may b-e quickly lled to a load capacity for greater than is possible in simple, one part bailers.

A further object is to provide a simple, substantial, practical and efficacious jar function bailer to expedite the drive of the bailer bottom into stiff or thick muck, or to aid in jarring loose some other obstacle or iish in the well, or to aid in forcing it into the bucket.

Also, it is an object of the invention to provide i a suction, cross-area piston of maximum size in bucket header or stem having telescopic relation with the barrel part and provided with apiston having packed working or sliding relation in the barrel, and especially to locate mutually engaging shoulders on the bucket stem and the barrel at a position below the packing device so as to substantiallyeliminate sanding up of the barrel by forcing all sand out.

A further object is to provide a simple, reliable and interiorly arranged combined trap valve for muck inlet and a side wall, port covering valve device for side dump of the elevated, that is, drawn bucket` at the top of the well.

The invention consists incertain improvements advancing this art as set forth in the ensuing `disclosure and having, with the above, additional objects and advantages as hereinafter developed, and whose construction,combinations and details of means, and the manner of operation will (Cl. 16S- 19) and principle of the invention as it is more directly claimed hereinbelow.

Figure 1 is an axial, elevational section of the bailer with the barrel and the buckets parts in the position assumed when either lowering into or pulling the bailer from the well hole.

Figure 2 is a crossor trans-axis section of the closed, side dumping valve and bucket wall.

Figure 3 is an axial section of the detached jarswivel.

The bailer assembly includes at its upper end a rope socket or bail joint2 the lower end of which is chambered to receive a suitable, downwardly closing valve ball or equivalent member 3 `past which liquid or gas may rise to vents ports 4 in the valve cage.

The ball 3 seats on a renewable ring 5 clamped in the cage end of joint 2 as by a threaded-in connection 5 whose lower end is threaded into the `upper end of a cylindrical barrel 8. The lower `a bucket stem I2 of tubular form more or less snugly fitting in the bushing nut 9 and having screwed on its upper end a mandrel or head I3 slidably fitting the bore of the barrel 3 and having a bore I4 of about the same `dimension as thatof the hollow stem I2.

In order that advantage may be taken of the full diameter of the bore of the working barrel it will be seen that the head I3 has a reduced upperpart I5 about which is a stack of downwardly facing, V-section packing rings I6, Fig. 3, bearing outwardly directly against the bore face of the barrel 8 so that this maximum diameter of the bore is availed of for suctional function when the barrel is relatively shifted upward as to the stem head I3. The packing I6 is clamped down by a mandrel nut I'I.

Opposed to the abutment face IB on the bush nut `Sl the stem head I3 is provided with a cooperative strike end I8; the faces II] and I8 being engaged when the bailer is being lowered or drawn.

The mandrel nut `I 1 constitutes also a substantial anvil to receive the pounding of the lower end of connector 6 which has the function of hammering clown on the `stem anvil part Il as may be desired occasionally in lowering the bailer into the well and muck.

The lower end of the stem l2 is threaded into the upper end of a bailer connector I9 welded or otherwise secured to the top of a bucket 20 of about equal outside dimension to the outside diameter of the barrel for capacity advantage in being lowered into a well casing or liner.

A feature of the invention resides in an improved form of bottom inlet valve and side unloading means for bailers of this vgeneral type. Thelower end of `the bucket 20 is provided with a durable bucket bottom 2| into which snugly screws a serrated, wear shoe 22 of tubular form for up flow of liquid, gas and muck as the bottom 2| sets down in the well; the shoe having upwardly opening check Valve 23 suitably pivoted rat 24, andforrned on or fixed to the upper end yof the shoe 22 is an upright wall part forming a laterally shiftable closure 25 lying operatively close to the bore face of the bottom`2| forv the purpose of normally closing a contiguous side discharge port 26 in the wall of the bottom 2|,

The closure 25 is in cross-section a portion of an annulus and is suitably wider than the annular port 26 to amply coverv it, and the outer face of the closure 25 may be provided with packing 2l to seal marginally about the port 26.

To unload the bailer at the head of the well, the shoe 22 is `relatively turned a quarter revolution or so in the bottom 2| to uncover the side port 26, and is reversed the same degree to close it. To protect the screw threads of the shoe 22 any suitable packing 28 may beset between the end edge of the bottom 2| and the top thread of the shoe; to keep ne sand from the threads.

When the bailer'bucket is landed on the bottom of the well hole the upper barrel 8 ymay be reciprocated as tothe standing piston-forming head |3 on the bucketstem I2 to facilitate filling the bucket, and during such action the well liquid may flow in and out of the ports il to wash out any sand that may collect between the lift shoulders at nut 5l.

What is claimed is:

l. A bailer, of the class described, having an upper valved barrel section provided with a thin walled bushing in its lower end presenting a narrow edged, annular lhannner in the bore of l the barrel and the barrel having breather ports above and near said edge, and a lower bucket unit having a Itliin walled stem telescoping in the bushing and provided with a thin walled piston matching said hammer edge and operative to close said ports when opposite thereto and the piston havingv a Apacking running on the barrel..

bore ,.surface;r saidl piston being valveless and 'having a clear bore of aboutv equal diameter to the bore of the stem so that the bucket, the barrel and thel stem have an unobstructed chamber of as uniform diameter asv practical for `carrying capacity.

2. The bailerof claim l, and the pieton. being threaded onto the stern and having a reduced outer upper end portion for vthe packing, and an 

